Car-truck connection



(No Model.)

A. TWYMAN.

GAR TRUCK CONNECTION.

Patented Jan. 8, 1889.

INVENTORD WITNESS ES N- PUERS, PholoLhhognpher. Willlington. D Q

UNITED STAT S PATENT OFF CE;

AARON TIVYMAN, OF PULLD'IAN, ILLINOIS.

CAR-TRUCK CONNECTION.

SPECIFICATION forming part of Letters Patent No. 395,859, dated January 8, 1889.

Application filed January 16, 1888. Serial No. 260,895- (No model.)

To all whom it may concern.-

Be it known that I, AARON TWYMAN, of Pullman, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Railroad Car and Truck Connections, of which the following is a full, clear, and exact description.

This invention is more particularly designed to be applied to that description of railroad passenger-cars which contain within themselves the apparatus used in their propulsion-as, for instance, cars carrying a steam, electric, or other motor, or having apparatus or devices within them which may be either directly or indirectly attached to an outside propelling means or power, as in the case of cable-grip cars. The invention provides, as will be hereinafter shown, for attaching a car-body to a truck in such a manner as to leave an open space at the center of or within the attachment, which open space may be utilizedfor the convenientplacing of a motor or grip, or for any other purpose.

In cars constructed to be carried upon independent trucks it is usual to connect the car-body to the truck by means of center plates, one of which is attached to the truck and the other to the body of the car, and which, being provided with convenient bearing-surfaces, carry the superincumbent weight of the ear upon the central part of the truck, and, being in contact, have combined with them a king-bolt, the whole being designed to form a pivot or pivotal point around which the truck may swivel or rot-ate when passing around curves in the track upon which the car is running. To prevent the undue oscillation of the car upon the truck, various means have been provided, including two auxiliary bearing-plates upon the truck, one upon each side, known as side bearings, and two upon the car-body, or, instead of these side bearing plates, side bearing wheels have been used.

My invention consists in a system of par allel or jointed bars connecting the truck with the car-body around or outside of the pivotal center of motion of the truck, whereby the ki'ng-bolt and center plates are dispensed with and a central or open space left at such place, and whereby, also, special or separate side bearings may or may not be used, and the jointed-bar connection be employed, if desired, to support the car; but the primary action of said connection is to tie the car in a central position relatively to the truck and to provide for the turning or swivcling of the truck around a central or pivotal point or axis within said jointed-bar connection, substantially as hereinafter described.

Reference is to be had to the accompanying drawings, formin a part of this speci tication, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a longitudinal sectional elevation of a railroad-car and four-wheeled truck in part, with my invention applied, and showing the frame of a motor mounted upon the truck and partly projecting up into the car or through the floor thereof. Fig. 2 is an end view of the truck and showing the jointedbar connection or attachment of the truck to the car-body. Fig. 3 is a plan view of the jointed bar-connection detached.

The wheels a (t of the truck, with their axles, journals, and, bearings, are or may be arranged in the usual manner with side frames carryin the transoms l) b, which support the frame 0 of a propelling-motor or other device, which it may be found convenient to attach to the truck and the body of the car, the floor-framing only of which is shown at (Z.

The j ointed-bar connection between the car and truck, as here represented, consists in part of two bars, 9 9, supported at their centers and pivoted intermediately of their length upon pins h 71', and of two other bars, 6 e, jointed at their ends by connecting-pins -i i 1 i with the ends of the bars g g, the floorframing d of the car being furnished with socket-plates 7;, (one of which only is here shown,) supported on the centers of the bars 6 e, or attached to the bars 6 e by pins ff. This system of jointed bars constitutes a combination of parallel bars arranged outside of or around the pivotal center of motion of the truck, .9, in Fig. 3, indicating such centerof motion.

The bars e e and g g are held in their proper double parallel relati0nthat is, the two bars e e with one another and the two bars 9 g ff, 1111110111311 to the e1'1r-l1odiy.

tween the several hars is left open or lfree for 1 the insertion of a motor, gripping devices, or 1 l the truck, substantially as specified.

with each otherl1y the pins 71 71, attached to the truck-frame, and the pins or connections for any other purpose that may he desired. \Vith 111' I1 this jointed-bar connection between the truck and the ear-111111 1 it will he seen 111111, although the ("enter 111 the truck, which 1T1'1rn1sthe pivotal axis, reinains fixed in its horizontal relation with the (1111-1101113 the truck is tree 111 swivel or rotate around this central fixed or pivotal point to the extent re1111isite in passing around curves in the traeh upon which the car 11111 11111 r1111- nin e', the motion or action 111 said hai's being illnstrztted by dotted lines in Fig. I

The space he- 1 for the p11rp1'1seo1' snstainingtlwear, as shown \1'11ere the pins are in extended soeheted connection with the ear, as well as for holdthe is not restricted to 11 like conneetimi 111' the car at 1111111 111' its ends, 111111 3 11111 he applied either to a car running npon fo11r-wheeled trucks, for instance, or to a car to the ear and truck, snhstanti1'1lly as and for having a ton r-wheeled truck at one end, while its other end is otherwise carried.

Ilavin gthns described my invention, what 1 claim as new, and desire to secure 1 1 Letters 1 Patent, is-

1. In railroad car and truck connections, the 1111111111111111111, with the 1::11'111111 11'1.1ck,o1' a series of bars pivoted or jointed to one 1111- other around or outside of the center of the swiveling motion of the truck, to form an open central space, and pivoted, respectively, in sets, one to the ear-body and another to 2. I11 r11i1ro11d ear and truck connections, the 01111111111111.1011, with the car and truck, of the within-descrihed system or series of bars arranged in pairs in. crossing relation with each other, to 11111-111 an open central space, and '1ivo1e1l to each other at their ends, the one pair 111. bars being pivotally connected intel-1111 111111111 y 1.11; their length to the truck and the other pair 111? hairs havin each combined with them a socket; and pin arranged to conneet them i11terinediately of their length with the ean'hody, wl1ercli1y the ear is not only held in :1 central position upon the truck, but the hars may he 111111111 to sustain the weight (11? the car, essentially as shown and described.

.-1. In railroad car and truck connections,

' the con1l1ination, with the truck, 01' the car having an opening in its bottom or floor arranged over the center of the truck, and a series of parallel or erossin hars arranged in relation with said op1n1ing,to form an open central space thereninler, and pivoted or jointed 111 each other, also pivoted or connected interniediately (111' 1 111;.1i1'leng't h in pairs the purpose or p11 rposes herein set forth.

AARON '1T\\'Y1\IAN, 

